We have an essential update on the scope and timeline of a previously announced Legacy CTA sunset . Starting September 1st, 2025, all new CTAs must be created using the new CTA editor. Existing Legacy CTAs that have already been created will c read more

We have revised the size restrictions for App Events, also referred to as Timeline Events or Integration Events, to ensure seamless integration within the UnifiedEvents ecosystem. What's changing? Previously, the instance size limitations read more

In December 2023, Clearbit was acquired by HubSpot, marking the beginning of an exciting new chapter for both companies. Since then, the Clearbit team has fully integrated into HubSpot, combining our expertise with HubSpot’s resources to bet read more

What's changing? The “alter list membership” action ( "actionTypeId": "0-13" ) is being split into two distinct actions: “add to list” ( actionTypeId 0-63809083 ) and “remove from list” ( actionTypeId 0-63863438 ). These new separate action types read more

What’s changing Starting on May 30, 2025 , the HubSpot CMS for Developers Certification will no longer be available. The content of this course has been updated over the years but has hit a point that significant revisions are needed to to read more

Happy (last day of) February, devs! It's cold here in Brooklyn, where our editor resides - but luckily, everything happening for HubSpot developers this month is keeping her toasty warm in front of her laptop! 🔥 From the return of the Hub read more

HubSpot's February 2025 developer updates include a new Tax Rates API for managing commerce tax rates, updates to the Exports API for better control and efficiency, visibility of unpublished custom workflow actions in developer test accounts, a new read more

Beginning on May 28, 2025 , we are enforcing the CMS HubL function limits for all customers using the following functions in their Marketing Emails, per our Software Products, Packaging, and Limits policies . Affected HubL Functions: read more

Beginning on March 5, 2025, deprecated event types will no longer be returned from the endpoint to get all event types : GET /events/v3/events/event-types Why is this changing? Event types get deprecated after they haven't been used f read more

The v3 Lists API beta currently accepts both integers and strings for the ID of public folders used for list segmentation and returns the ID as an integer. We will be updating the IDs to use only strings in order to conform to the HubSpot specif read more

The v2 Owners API will officially be sunset on March 24th, 2025 , with no further extensions. After this date, all v2 Owners API endpoints will be fully sunset and return a 404 error response. This marks the final stage of our transition to the mor read more

The HubSpot Ecosystem Mentorship Program is open for applications ! This 9-month program pairs experienced professionals with those looking to deepen their technical skills and grow their careers within the HubSpot ecosystem. 👉 For Ment read more